You don't know the man, how do you come to the conclusion success has gotten into his head? How do you know Hobbit will be a comedy with lame jokes? How do you know he's putting technology ahead of the story? That's it's all about money? I could go on and on. It's pretty absurd to be honest. Sorry, have you seen the video logs? He's not putting actors in front of nothing, there are sets, green screen is being used for backgrounds, for set extensions primarily. LOTR had tons of green screen and CGI as well.

I can't even say for sure all that stuff holds true for Lucas. I don't know him. He might be just a talentless director that got lucky with the first Star Wars, the only one he directed from the old trilogy btw.